Sopanen

Finnish

Possibly from Karelian vernacular form of Russian Сысой (Sysoj) +‎ -nen.^[1]

Sopanen

Inflection of Sopanen (Kotus type 38/nainen, no gradation)
nominative		Sopanen	Sopaset
genitive		Sopasen	Sopasten Sopasien
partitive		Sopasta	Sopasia
illative		Sopaseen	Sopasiin
		singular	plural
nominative		Sopanen	Sopaset
accusative	nom.	Sopanen	Sopaset
accusative	gen.	Sopasen	Sopaset
genitive		Sopasen	Sopasten Sopasien
partitive		Sopasta	Sopasia
inessive		Sopasessa	Sopasissa
elative		Sopasesta	Sopasista
illative		Sopaseen	Sopasiin
adessive		Sopasella	Sopasilla
ablative		Sopaselta	Sopasilta
allative		Sopaselle	Sopasille
essive		Sopasena	Sopasina
translative		Sopaseksi	Sopasiksi
abessive		Sopasetta	Sopasitta
instructive		—	Sopasin
comitative		See the possessive forms below.

Possessive forms of Sopanen (Kotus type 38/nainen, no gradation)

first-person singular possessor
		singular	plural
nominative		Sopaseni	Sopaseni
accusative	nom.	Sopaseni	Sopaseni
accusative	gen.	Sopaseni	Sopaseni
genitive		Sopaseni	Sopasteni Sopasieni
partitive		Sopastani	Sopasiani
inessive		Sopasessani	Sopasissani
elative		Sopasestani	Sopasistani
illative		Sopaseeni	Sopasiini
adessive		Sopasellani	Sopasillani
ablative		Sopaseltani	Sopasiltani
allative		Sopaselleni	Sopasilleni
essive		Sopasenani	Sopasinani
translative		Sopasekseni	Sopasikseni
abessive		Sopasettani	Sopasittani
instructive		—	—
comitative		—	Sopasineni

second-person singular possessor
		singular	plural
nominative		Sopasesi	Sopasesi
accusative	nom.	Sopasesi	Sopasesi
accusative	gen.	Sopasesi	Sopasesi
genitive		Sopasesi	Sopastesi Sopasiesi
partitive		Sopastasi	Sopasiasi
inessive		Sopasessasi	Sopasissasi
elative		Sopasestasi	Sopasistasi
illative		Sopaseesi	Sopasiisi
adessive		Sopasellasi	Sopasillasi
ablative		Sopaseltasi	Sopasiltasi
allative		Sopasellesi	Sopasillesi
essive		Sopasenasi	Sopasinasi
translative		Sopaseksesi	Sopasiksesi
abessive		Sopasettasi	Sopasittasi
instructive		—	—
comitative		—	Sopasinesi

first-person plural possessor
		singular	plural
nominative		Sopasemme	Sopasemme
accusative	nom.	Sopasemme	Sopasemme
accusative	gen.	Sopasemme	Sopasemme
genitive		Sopasemme	Sopastemme Sopasiemme
partitive		Sopastamme	Sopasiamme
inessive		Sopasessamme	Sopasissamme
elative		Sopasestamme	Sopasistamme
illative		Sopaseemme	Sopasiimme
adessive		Sopasellamme	Sopasillamme
ablative		Sopaseltamme	Sopasiltamme
allative		Sopasellemme	Sopasillemme
essive		Sopasenamme	Sopasinamme
translative		Sopaseksemme	Sopasiksemme
abessive		Sopasettamme	Sopasittamme
instructive		—	—
comitative		—	Sopasinemme

second-person plural possessor
		singular	plural
nominative		Sopasenne	Sopasenne
accusative	nom.	Sopasenne	Sopasenne
accusative	gen.	Sopasenne	Sopasenne
genitive		Sopasenne	Sopastenne Sopasienne
partitive		Sopastanne	Sopasianne
inessive		Sopasessanne	Sopasissanne
elative		Sopasestanne	Sopasistanne
illative		Sopaseenne	Sopasiinne
adessive		Sopasellanne	Sopasillanne
ablative		Sopaseltanne	Sopasiltanne
allative		Sopasellenne	Sopasillenne
essive		Sopasenanne	Sopasinanne
translative		Sopaseksenne	Sopasiksenne
abessive		Sopasettanne	Sopasittanne
instructive		—	—
comitative		—	Sopasinenne

Sopanen is the 1249^th (tied with 3 other surnames) most common surname in Finland, belonging to 683 individuals, according to February 2023 data from the Digital and Population Data Services Agency of Finland.